import axios from "axios";
import { MessageBox, Message, Notification } from "element-ui";
import store from "@/store";
import { getToken } from "@/utils/auth";
import router from "@/router";

// 创建axios实例
const service = axios.create({
  baseURL: process.env.VUE_APP_BASE_API, // url = base url + request url
  // withCredentials: true, // send cookies when cross-domain requests
  timeout: 5000, // request timeout
});

// request拦截器
service.interceptors.request.use(
  (config) => {
    if (store.getters.token) {
      // 让每个请求携带自定义token
      config.headers["Authorization"] = "Bearer " + getToken();
    }
    config.headers["Content-Type"] = "application/json";
    return config;
  },
  (error) => {
    // do something with request error
    console.log(error); // for debug
    return Promise.reject(error);
  }
);

// 响应拦截器
// response 拦截器
service.interceptors.response.use(
  (response) => {
    const code = response.status;
    if (code < 200 || code > 300) {
      Message({
        message: response.errors,
        type: "error",
        duration: 3 * 1000,
      });
      return Promise.reject("error");
    } else {
      return response.data;
    }
  },
  (error) => {
    let code = 0;
    let errors = "";
    let errorData = "";
    try {
      code = error.response.status;
      errors = error.response.data.errors;
      errorData = error.response.data;
    } catch (e) {
      if (error.toString().indexOf("timeout")) {
        Message({
          message: "后端接口服务错误!",
          type: "error",
          duration: 3 * 1000,
        });
        return Promise.reject(error);
      }
    }
    if (code === 401) {
      MessageBox.confirm(
        "登录状态过期了哦，您可以继续留在该页面，或者重新登录",
        "系统提示",
        {
          confirmButtonText: "重新登录",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).then(() => {
        store.dispatch("user/resetToken").then(() => {
          location.reload(); // 为了重新实例化vue-router对象 避免bug
        });
      });
    } else if (code === 403) {
      // 权限不够时走的路由
      router.push({ path: "/401" });
    } else if (code === 400) {
      Message({
        message: errors || errorData || "服务端错误",
        type: "error",
        duration: 3 * 1000,
      });
    } else if (code === 404) {
      Notification.error({
        title: "错误",
        message: "请求接口不存在!",
      });
    } else if (code === 502) {
      Notification.error({
        title: "错误",
        message: errors || errorData || "后端服务器连接失败!",
      });
    } else if (code === 500) {
      Notification.error({
        title: "错误",
        message: errors || errorData || "服务端错误!",
      });
    } else {
      Notification.error({
        title: "错误",
        message: errors || errorData || "服务端未知错误!",
      });
    }
    return Promise.reject(error);
  }
);

export default service;
